Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Novel anti-shearing branch polymer oil displacement agent and synthetic method thereof

A technology of dendritic polymers and synthesis methods, applied in the field of new anti-shearing dendritic polymer oil displacement agents and their synthesis, can solve the problem of reducing the actual control degree of polymer flooding, affecting the application effect of polymer flooding, and polymer solutions Low viscosity retention rate and other problems, to achieve strong promotion and application value, reduce water phase permeability, and improve oil recovery

Inactive Publication Date: 2013-09-25
SOUTHWEST PETROLEUM UNIV
View PDF5 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] The present invention provides a shear-resistant dendritic polymer oil displacement agent and its synthesis method, aiming to solve the problems existing in the application of common polymers provided by the prior art in medium and low permeability reservoirs. At low shear rates, The polymer has a high apparent viscosity and cannot be well injected into medium and low permeability reservoirs. However, under the action of high shear, the viscosity retention rate of the polymer solution is low, and the viscosity drops rapidly, and it is an irreversible process. The actual control degree of polymer flooding is limited, it cannot penetrate deep into the reservoir well, and the long-term stability is poor, which seriously affects the application effect of polymer flooding technology

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Novel anti-shearing branch polymer oil displacement agent and synthetic method thereof
  • Novel anti-shearing branch polymer oil displacement agent and synthetic method thereof
  • Novel anti-shearing branch polymer oil displacement agent and synthetic method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Embodiment 1: 1,3-propanediamine is the preparation of the polyamide-amine modified dendritic skeleton GA of nucleus

[0053] Add 30g of methanol into a 250mL flask, slowly add 11.1g of 1,3-propanediamine under stirring, and add 103.2g of methyl acrylate dropwise using a constant pressure dropping funnel in a constant temperature water bath at 15-25°C. After stirring for 24 hours, reduce The solvent methanol and excess methyl acrylate were removed by pressure distillation to obtain the macromolecule G0.5 with a yield of 97-99.3%.

[0054] Dissolve 20.9g of the prepared G0.520.9g in 60g of methanol solvent, add 88.8g of 1,3-propylenediamine dropwise through a constant pressure dropping funnel at a constant temperature of 15-25°C, react for 24h, and distill off the solvent methanol and excess 1,3-propanediamine, the yield of 96.8-98.7% of the macromolecule G1.0 was obtained.

[0055] Dissolve 17.85g of the prepared G1.017.85g with 58g of methanol solvent. At a constant t...

Embodiment 2

[0059] Embodiment 2: the synthesis of terpolymer AM / NaAA / GA

[0060]Weigh 2.0g of sodium acrylate into a 125mL jar, add 20g of deionized water, adjust the pH of the system to 6.5-7.5 with NaOH, add 8.0g of acrylamide and 0.8mL of GA aqueous solution (mass concentration 1%) under stirring conditions, The total mass percentage concentration of the prepared monomer is 15-30% aqueous solution, nitrogen gas is passed for 20 minutes, and it is placed in a constant temperature water bath;

[0061] Add 1mL of sodium formate solution (mass concentration 0.1%), and then add redox initiator system ammonium persulfate solution and sodium bisulfite solution. 0.08-0.5% of the mass, continue to feed nitrogen for 10-20min, and react at a temperature of 30-60°C for 3-10h;

[0062] Wash three times with absolute ethanol, pulverize and dry to obtain AM / NaAA / GA terpolymer.

Embodiment 3

[0063] Embodiment 3: Structural characterization of terpolymer AM / NaAA / GA

[0064] The infrared spectrogram of the ternary polymer AM / NaAA / GA synthesized by embodiment 2 is as follows figure 1 shown. It is known from the figure that the amide group (-CONH 2 ) characteristic vibration peaks at 3442cm -1 、1660-1640cm -1 、624cm -1 , the stretching vibration peak of the secondary amino group (-NH-) is at 3500-3200cm -1 , the carbonyl (-C=O) vibration peak of the carboxylic acid group is at 2733cm -1 、2553cm -1 、1654cm -1 place.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
viscosityaaaaaaaaaa
lengthaaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a novel anti-shearing branch polymer oil displacement agent and a synthetic method thereof. According to the technical scheme, the following raw materials and monomers in mass percent are used: 73.5-84.95% of acrylamide (AM), 15-25% of sodium acrylate NaAA and 0.05-1.5% of polyamidoamine modified branch skeleton GA taking 1,3-propane diamine as a core. The synthetic method of the novel anti-shearing branch polymer oil displacement agent comprises the following steps of: adding NaAA into a reactor, adding pure water, regulating pH to be 6.5-7.5 with NaOH, stirring and adding AM and GA, preparing a solution with the concentration of 15-30%, introducing nitrogen for 20 minutes, then adding an initiating agent, continuously introducing the nitrogen for 10-20 minutes, and reacting for 3-10 hours at 30-60 DEG C; and finally washing, smashing and drying, thus an AM / NaAA / GA ternary polymer is obtained. The novel anti-shearing branch polymer oil displacement agent shows good shearing dilutability, the problem of injection of medium and low permeation oil reservoirs can be better solved, under lower shearing action, viscosity of the polymer can be rapidly restored, good fluidity control ability and aqueous phase permeability reducing capacity are realized, capacity of a polymer solution for expanding swept volume is improved, and simulated crude oil recovery ratio can be effectively increased by about 12.3%.

Description

technical field [0001] The invention belongs to the technical field of chemical production, and in particular relates to a novel anti-shearing dendrite polymer oil displacement agent used for oil displacement in oil fields to enhance oil recovery and a synthesis method thereof. Background technique [0002] With the deepening of oil and gas exploration and development and the increasing demand for oil and gas resources, medium and low permeability reservoirs have gradually become one of the main sources of oil and gas resources in my country. Among the proven oil reserves in my country, the reserves of medium and low permeability geological oil reservoirs account for more than 1 / 3 of the proven oil and gas resources geological reserves, and account for 3 / 4 of the newly added reserves and the geological reserves put into development since the "Ninth Five-Year Plan" about. (Hu Wenrui. Introduction to the Development of Low Permeability Oil and Gas Fields (Volume 1) [M]. Beijin...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/588C08F283/04C08F220/56C08F220/06
Inventor 赖南君张雪叶仲斌侯经洲张艳漆小芳
Owner SOUTHWEST PETROLEUM UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com